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kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region

🗓️ 06 Dec 2022 10:00:12Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 5 Views

Kernel virtual machine flaw allows unprivileged locals to write outside userspace via vm_pgoff in guest page updates.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.6aarch64bpftool0:4.18.0-372.36.1.el8_6bpftool-0:4.18.0-372.36.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lebpftool0:4.18.0-372.36.1.el8_6bpftool-0:4.18.0-372.36.1.el8_6.ppc64le.rpm
Red Hat Enterprise Linux8.6s390xbpftool0:4.18.0-372.36.1.el8_6bpftool-0:4.18.0-372.36.1.el8_6.s390x.rpm
Red Hat Enterprise Linux8.6x86_64bpftool0:4.18.0-372.36.1.el8_6bpftool-0:4.18.0-372.36.1.el8_6.x86_64.rpm
Red Hat Enterprise Linux8.6aarch64bpftool-debuginfo0:4.18.0-372.36.1.el8_6bpftool-debuginfo-0:4.18.0-372.36.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lebpftool-debuginfo0:4.18.0-372.36.1.el8_6bpftool-debuginfo-0:4.18.0-372.36.1.el8_6.ppc64le.rpm
Red Hat Enterprise Linux8.6s390xbpftool-debuginfo0:4.18.0-372.36.1.el8_6bpftool-debuginfo-0:4.18.0-372.36.1.el8_6.s390x.rpm
Red Hat Enterprise Linux8.6x86_64bpftool-debuginfo0:4.18.0-372.36.1.el8_6bpftool-debuginfo-0:4.18.0-372.36.1.el8_6.x86_64.rpm
Red Hat Enterprise Linux8.6aarch64kernel0:4.18.0-372.36.1.el8_6kernel-0:4.18.0-372.36.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lekernel0:4.18.0-372.36.1.el8_6kernel-0:4.18.0-372.36.1.el8_6.ppc64le.rpm
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29 Jun 2026 21:45Current
6.6Medium risk
Vulners AI Score6.6
CVSS 3.17.8
EPSS0.00385
5